Adelie Penguin Stable Isotope Records from Ross Sea Colonies

Stable isotope measurements from Adelie penguin bones and feathers trace dietary and foraging shifts over millennia. This research collection analyzes carbon, nitrogen, and sulfur isotopes from active and abandoned colonies to investigate responses to a warming period 4,000-2,000 years ago. The dataset is associated with a NASA EarthData project by AMD_USAPDC, with a last update recorded for 2026.

Use Cases

• Reconstruct historical penguin diet composition by analyzing δ13C and δ15N values in bone collagen.
• Model past foraging location shifts by correlating δ34S sulfur isotope signatures with known colony sites.
• Assess ecological responses to the mid-Holocene 'penguin optimum' warming event by comparing isotope ratios across temporal layers.
• Calibrate isotope baselines for modern climate studies using data from preserved tissues dating back over 45,000 years.

Strengths

• Data spans a multi-millennial timeframe, including the climatically significant 4,000-2,000 year BP period.
• Analyses leverage a suite of three stable isotopes (carbon, nitrogen, sulfur) for corroborating ecological signals.

Limitations

• Sample size and row count are unspecified, limiting statistical power assessment.
• Geographic scope is restricted to colonies in the Ross Sea region, not representative of the entire species range.

Provenance

Source

NASA EarthData platform, from the AMD_USAPDC organization.

Collection Method

Isotope analysis of collected biological tissues (bones, feathers, eggshells) from active and abandoned colonies.

Time Range

Middle to Late Holocene, with samples potentially dating from before 45,000 years ago to present.

Freshness

Projected update date is 2026-08-31, indicating planned future data additions.

Geography

Ross Sea region, Antarctica.